Practical skills assessed in the practical endorsement

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Question 1
Medium

A light micrograph of a pollen grain was taken using a ×10\times 10×10 objective lens. The eyepiece graticule was calibrated using a stage micrometer.

  • The 0 mark on the eyepiece graticule aligns with the 0 mark on the stage micrometer.
  • The 80 mark on the eyepiece graticule aligns with the 7th division mark on the stage micrometer scale.

Each division on the stage micrometer scale represents exactly 0.01 mm0.01\text{ mm}0.01 mm.

The pollen grain is measured using the same eyepiece graticule and is found to span from division 8 to division 43 on the eyepiece graticule scale.

Calculate the actual width of the pollen grain. Give your answer in μm\mu\text{m}μm to 2 significant figures.

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Practical skills assessed in the practical endorsement Questions

  1. A Level
  2. /Biology
  3. /Practical skills assessed in the practical endorsement